Inventor · disambiguated record
Hirofumi Yanagawa
Also filed as: YANAGAWA HIROFUMI
10 granted patents·2 pending applications·465 citations·filing 1983–2013
92Inventor score
Top patents by PatentIndex Score
12 records- 0190US5233664ASpeaker system and method of controlling directivity thereofPIONEER ELECTRONIC CORP·Filed 1992·Granted Aug 3, 1993·123 cites·19 claims
- 0286US5953432ALine source speaker systemPIONEER ELECTRONIC CORP·Filed 1997·Granted Sep 14, 1999·122 cites·1 claims
- 0385US5604810ASound field control system for a multi-speaker systemPIONEER ELECTRONIC CORP·Filed 1994·Granted Feb 18, 1997·50 cites·2 claims
- 0481US4509184AStereo sound systemPIONEER ELECTRONIC CORP·Filed 1983·Granted Apr 2, 1985·53 cites·7 claims
- 0560US5372897ARectangular nickel-metal hydride secondary cellTOSHIBA BATTERY·Filed 1993·Granted Dec 13, 1994·24 cites·9 claims
- 0657US5490867AMethod of making a rectangular nickel-metal hydride secondary cellTOSHIBA BATTERY·Filed 1994·Granted Feb 13, 1996·22 cites·7 claims
- 0756US5128999ASound field correcting apparatusPIONEER ELECTRONIC CORP·Filed 1991·Granted Jul 7, 1992·19 cites·5 claims
- 0851US5537733AMethod of manufacturing a nickel-metal hydride secondary cellTOSHIBA BATTERY·Filed 1994·Granted Jul 23, 1996·16 cites·10 claims
- 0945US5604809ASound field control systemPIONEER ELECTRONIC CORP·Filed 1995·Granted Feb 18, 1997·26 cites·3 claims
- 1045US2009161879A1Sound Signal Processing Device, Method of Processing Sound Signal, Sound Reproducing System, Method of Designing Sound Signal Processing DeviceYANAGAWA HIROFUMI·Filed 2005·Application pending·0 cites
- 1143US2015319549A1Sound field adjustment filter, sound field adjustment apparatus and sound field adjustment methodCHIBA INST TECHNOLOGY·Filed 2013·Application pending·0 cites
- 1239US5987143AMethod and apparatus for erasing acoustic echoPIONEER ELECTRONIC CORP·Filed 1997·Granted Nov 16, 1999·10 cites·7 claims
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